Roller-bearing.



B. W. FJELLIVIAN.

ROLLER BEARING. APPLICATION rlLEn JULY 21.1916.

Patented Nov. 5, 1918.

2 SHEETS-SHEET 2.

NVENTOR BENGT WIKTOR FJELLMAN, 0F GOTTENBORG, SWEDEN, .ASSIGrNOR TO AKTIEBOLAGET SVENSKA KULLAGERFABRIKEN, OF GOTTENIBORG, SWEDEN, A CORPORATION OF swnnif..

ROLLER-BEARING.

Patented Nov. 5, 19518.

Application filed July 27, 1916. Serial No. 111,588.

To all whom z' may concern:

Be it known that I, BENGT WIK'roR FJELL- infin, a subject of the King of Sweden, reslding at Gottenborg, in the Kingdom of Sweden, have invented certain ne and useful Improvements in Roller-Bearings, of which the following is a specification.

This invention relates to double row" rollerbearings of the type having outwardly taperlng conical rollers and having, between the two rows of rollers, a distance-ring or other spacing device adapted to keep the rollers in position relatively to the transverse Acenltral plane of the bearing and to take up the thrust from the race-rings which tends to move the rollers inward toward the transverse central plane of the bearing.

In bearings having cylindrical rollers, no such end thrust is exerted on them, and consequently the rollers are fairly easily guided and maintained in their correct position. In the case of conical bearings, however, there is considerable pressure exerted axially on the rollers and the friction may thereforebecome excessive; this is particularly so when the conical rollers are guided by gudgeon pins formed on each end engaging the spacing device and the object of this invention isto provide a conical bearingof the kind described, in which the friction is the least possible, without jeopardizing the retention and guidance of the rollers in exact positions relatively to each other.

The invention comprises therefore a double row of conical roller-bearing of the type described wherein the inner end of each roller is ground accurately plane at or in the proximity of its axis and each roller bears on an accurately ground part of the spacing device only at, or in the proximity of, its own axis. By forming the two sets of bearing-surfaces accurately smooth, and of the correct shape and size, it can be insured that each of the rollers has an accurate contact on the three sides, with the outer race-ring, the inner race-ring and the spacing device respectively with a minimum amount of friction.

The invention further consists in certain constructional forms of said arrangement, such forms 'being hereinafter particularly described.

In the drawings, several embodiments of the invention are illustrated, Figure l is a longitudinal section and Fig. 2 is. a partial end view of a roller bearing having a dis' tance ring according to the invention. Fig. 3 is a section on line A-fA of Fig. 1. Figs. 4 to 6 are longitudinal sections of parts of roller bearings having distance rings of different construction. Fig. 7 is a section on line VII-VII of Fig. 6. Fig. 7a is a plan view of part of the roller cage shown in Fig. 6. Fig. S is a longitudinal section'of a modified form of roller bearing, and Fig. 9 is a section on line B-B of Fig. 8. Fig. 10 is a longitudinal section, and Fig. 11 is a partial end view of a roller bearing in which balls are used for the distance ring. Figs. 12 to 19 show the invention applied to roller bearings having races of different forms.

Referring first to Figs. 1 to 3, the inner ring 1 is provided with aI spherical race, while the outer ring 2 is provided with two conical races having their apices on the axis of the bearing. Also the rollers 4 are conical in shape, the apices of the cones coinciding with the apices of the cones formed by the outer races. Placed between the two rows of rollers is a distance ring 5, on which the rollers bear with their inner end surfaces which are plane next to the axes of the rollers, said ring serving to take up thrust from the rollers and to keep them at predetermined distances froni one another and from the radial center plane of the bearing, without too great friction arising at the contact points. The ring 5 is provided, at Aboth sides, with wings or projections 6 designed to enter between the rollers of each set or row and to keep the rollers of each set at predetermined distances from one another. The ring 5 thus also serves as an ordinary roller cage.

In the modification according to Fig. 4, the ring 5 is provided with bolts 7 on which the rollers 4 are journaled. The bolts 7 belonging to one and the same set of rollers pass through a conical ring 8 bearing on the outer ends of the rollers; said ring may be secured for' instance by a wire 9 passed through the bolts or by the ends of the bolts said rollers are placed right opposite each other in the form according to 5. ln

lli@ luSt ineiilioned form. :i bolt passiug llirough lre ring 5 :ind Wuuuimi l@ tw@ opper silely arranged rollenl @nu bv used.

Fig. G Shows :l modirziliou, iu which the rollers are plural iu u rullrr nge lll ruud@ of sheet metaln .said rug@ surroiuidiiig die din-tance ring The tiro outer edges 0f said Cage may be bent s0 is to 'form llurig'vsi ll bearing ou lli@ outer end Surfaces 0f Julie rollers, ag shown at the riglilizmd side of Suid figure.

ln T, :i ser-limi llirougjli pa la of lli@ roller Cage, ou lliio Vil-VH or' l, ifi

l5 Shown.

Fig. u pluu view of u portion of die slimerfi Figs Di,

imi 9 show :i rollr herring;q in 'le ,surfaces ol" lie distance ring' illi cirrulzir {ufOJQClmus l2 mi which lli@ iiiuor ends or' lli@ rollorsi lueur :il their criierfs. 'lie ring' 5 *lfGrmQ roller rugs lil-Y being provided willi lailerzil profe@ iii :i5 l forming' pockets nur the rullnrss.

be replaced by .lil jiliicr-d in. :i rulifar ugs 5, slimil lf. luv rollrrs lira 'willi lili@ Ceu- )alle muv l a placed mf iiiSlziiirQ iii 'il '3, is ludica u "dif-3 lop of nl oclils i i wird lll Ti'liol ring. muteren nu suiliriori :fuori @mili-0l, or

sullicieul :iig h@urlare al;

rmi lio ullliuizird iilimi lli purl;- ol Fig.

fui" si Single @Oui Err circulur arcs Whose cuceiilfer A inner sp Qri-I S @j rulleray Sii 'l Spoudliig p; 1 f Quali ruw 3Q Slime inuiiur N lli@ conical rmi for@ rilcril) y Fig. 'lvlsliffivs a irmdiliruion ir Tfliicli lli@ inner riir` s prc-"fidm'l Willi u wirrix raro im friuli gel of rolliir-r I Scribcd -0 self'aliniiig and prnvided 'Wirli knee rings erich marde in one. piece. The mounting o such i bearing is performed in lli@ following iii-ruiner: The ring 3 is placed iu lli@ oulrr ring 2 and lli@ rollcrs .err-e filled in, with lie exception of wo pairs of diaiuoricully oppmite rollers of lie (me Set of rollirs. ,flic inner ring l is dioreupon introduced iirlo lli@ Smc@ corresponding to lli@ missing rollers, umil i'i bears mi die roll rs of the Ollie? Seli. 'lllie inner ri l which, while being inseredi has its axis perpendiculur ll@ lli@ axis of lli@ Outr ring', is liereupon turned :r quiirler of a rmoluin about rire axis of the oul'er ring Se lmt lli@ remaining" rollers can be placed iii pniioii, l lien lris has been dmie, dia inner ring i irned iiigci lli@ posiiori in which ils cenit' man@ 30- im i, ,lm/t. of the wier i ille iiiveuioii um zilsu lie ui in roller 35 bearings lim'i divided race @Gir sti-urli ,rml ffm is nl" auch lisariiis are Sliw'i;

in W

a me ring @Muir1 the races of the inner ring is greater than the radius of a sphere, touching the rollers at their inner sides. The outer ring is divided and Akept together by a cylindrical ring 20 having bent edges.

The bearings according to Figs. 17 to 19 are rigid, While the bearings having a spherically shaped inner race according to Figs. 1 to 13 are self-alining.

In the above, different forms of the distance ring have been described by way of example.

The projections 6 of the distance rings 5 formed as roller cages can be placed either opposite each other (see for instance Fig. 8) or in staggered relationship (see for instance Fig. 1) according as it be desired thatdistance-piece itself or a ball carried by the distance-piece must be accurately ground to the correct size and finished.

l claim as my invention 1. A double row roller bearing having outwardly tapered conical rollers, the inner end of each roller being ground accurately plane at or in the proximity of its axis, a spacing device between the two rows of rollers and having accurately ground faces for engaging said rollers and adapted to keep the same in position relatively to the radial center plane of the bearing to take the end thrust from the race rings,- each roller bearing on the spacing device at or in l the proximity of its axis only.

2. A double row roller bearing having outwardly tapering conical rollers, the inner end of each roller being provided with a frusto-conical end ha'ving an accurately ground plane face, and a spacing ring lo,

cated between the rows of rollers and engaging each said roller at the said plane face.

In testimony whereof I aiiX my signature.

BENGT WIKTOR FJELLMAN. 

